The champions scored 16 goals in three matches and allowed their rivals to break their net only twice.
Indonesia were also presented the fair-play award. They also grabbed titles for the best player and best scorer.
Vietnam received the silver medal after drawing 0-0 with Myanmar, who were placed third.
It was the first ever tournament for the U15s held in the region. The event sponsored by Tien Phong Plastics Company is expected to be held annually.